A. F= [(X☉Y)'+(XYZ)'](W'+X+Z)=[(X⊕Y)+X'+Y'+Z'](W'+X+Y)=(XYZ)'(WX'Y')'
B. F=X⊕Y⊕Z=(X'Y+XY')⊕Z=(X'Y+XY')'Z+(X'Y+XY')Z'
C. F=W'Z[XY'+(Y⊕X)]=W'Z[XY'+XY'+X'Y]=W'Z(XY'+X'Y)=W'Z(X⊕Y)
